Key holder



FIG. 1 is a perspective view of an ornamental design for a key holder according to the present invention;

FIG. 2 is a perspective view of thereof in use;

FIG. 3 is a top plan view of thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front view of thereof;

FIG. 6 is a right side view of thereof, the left side being a mirror image thereof;

FIG. 7 is a rear side view of thereof; and,

FIG. 8 is a cross-sectioned view taken along the lines 8--8 of FIG. 5. 

The ornamental design for a key holder, as shown and described. 